# SDR NAFA200400004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 26, 2004
- Submitted: March 29, 2004
- Operation: Air carrier
- Aircraft: [N7780B](https://openairdocs.org/aircraft/N7780B), registered now
- Make and model: Doug DC-6A
- Registry model: [Doug DC-6A](https://openairdocs.org/model/douglas-dc-6a) (OpenAirDocs)
- Aircraft serial: 45372
- Aircraft time: 22,349 hours
- Engine: Pwa R2800CB3
- Engine time: 2,306 hours
- System (JASC): [7421 · Spark Plug/Igniter](https://openairdocs.org/jasc/7421)
- Part: Spark Plug
- Part number: AUBURN283
- Condition: Shorted
- Location: Nr 11 Cylinder
- Part time: 410 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NAFA200400004

## Discrepancy

NR 1 ENGINE FEATHERED DUE TO NR 11 CYLINDER DOUBLE SHORTED SECONDARY. REPLACED BOTH FRONT AND REAR SPARK PLUGS ON NR 11 CYLINDER.  CHECKED GOOD.

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